正则表达式使用 match() 提取 javascript 中的字符串数组

Question

I'm trying to use string.match() to extract column names from an SQL query.

Here is a sample string:

CREATE TABLE "listings" (
        "listing_id"    INTEGER UNIQUE,
        "state" TEXT,
        "title" TEXT,
        "description"   TEXT,
        "price" TEXT,
        "currency_code" TEXT,
        "url"   TEXT,
        PRIMARY KEY("listing_id")

Expected results:

['listing_id', 'state', 'title', 'description', 'price', 'currency_code', 'url']

what I've tried: /(?<.\()(\")?+?(\")(?!\ \()/g

Is there a way to get column names without double quotes?

Answer 1

This regex will match " when its it not followed or preceded by ) or (

regex101 demo

(?<![\)\(])"(?![\)\(])

then you can substitute it with nothing' so they will be removed

Answer 2

You were close. Use the regex, /(?<?\()(:.\")(?+?)(:?\")(?!\s*\()/gm for your requirement.

Check this for the demo and the explanation of the regex.

Demo using Java:

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] args) {
        // Test string
        String str="CREATE TABLE \"listings\" (\n" + 
                "        \"listing_id\"    INTEGER UNIQUE,\n" + 
                "        \"state\" TEXT,\n" + 
                "        \"title\" TEXT,\n" + 
                "        \"description\"   TEXT,\n" + 
                "        \"price\" TEXT,\n" + 
                "        \"currency_code\" TEXT,\n" + 
                "        \"url\"   TEXT,\n" + 
                "        PRIMARY KEY(\"listing_id\")";
        
        Pattern pattern = Pattern.compile("(?<!\\()(?:\\\")(.+?)(?:\\\")(?!\\s*\\()");
        Matcher matcher = pattern.matcher(str);
        while (matcher.find()) {
            System.out.println(matcher.group(1));
        }
    }
}

Output:

listing_id
state
title
description
price
currency_code
url